GPU HEAD-TO-HEAD

AMD Radeon RX 7900 XTX vs NVIDIA RTX 4090

Which graphics card is better for running local language models? Here is how the AMD Radeon RX 7900 XTX (24 GB) compares against the NVIDIA RTX 4090 (24 GB) in real memory headroom, supported model architectures, and generation speed.

AMD · RDNA 3 24 GB VRAM

AMD Radeon RX 7900 XTX

  • Memory Bandwidth: 960 GB/s (GDDR6 384-bit)
  • Fits fully in VRAM: 36 popular models
  • Power Draw (TDP): 355W
  • Largest recommended (Q4): 32B–34B
View all AMD Radeon RX 7900 XTX models →
NVIDIA · Ada Lovelace 24 GB VRAM

NVIDIA RTX 4090

  • Memory Bandwidth: 1008 GB/s (GDDR6X 384-bit)
  • Fits fully in VRAM: 36 popular models
  • Power Draw (TDP): 450W
  • Largest recommended (Q4): 32B–34B
View all NVIDIA RTX 4090 models →

The AI Local Check Verdict: Which GPU should you buy for AI?

Both graphics cards share the exact same VRAM capacity (24 GB), meaning they can run the exact same parameter counts and quantization levels.

The deciding factor is memory bandwidth: The NVIDIA RTX 4090 leads with 1008 GB/s vs 960 GB/s (5.0% faster memory), resulting in noticeably faster inference.

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